Updated on 2025/08/05

写真a

 
HOU Yafei
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
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Degree

  • 博士(工学) ( 高知工科大学 )

  • 博士(理学)

  • 修士(工学)

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering  / MIMOシステム、機器学習、位置推定、5G・6G、次世代デジタルTVシステム

Education

  • Fudan University    

    2002.9 - 2007.7

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  • Kochi University of Technology   基盤工学研究科  

    2004.4 - 2007.3

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Research History

  • Okayama University   Faculty of Environmental, Life, Natural Science and Technology   Associate Professor

    2024.4

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  • Okayama University   The Graduate School of Natural Science and Technology   Assistant Professor

    2017.4 - 2024.3

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  • Advanced Telecommunications Research Institute International   Wave Engineering Laboratories   Visiting Researcher

    2014.4 - 2024.3

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  • Nara Institute of Science and Technology   The Division of Information Science   Assistant Professor

    2014.4 - 2017.3

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  • Advanced Telecommunications Research Institute International   Wave Engineering Laboratories   Researcher fellow

    2010.10 - 2014.3

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  • Ryukoku University   Research Center for Information Communication Systems   Postdoctoral fellow

    2007.8 - 2010.9

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Professional Memberships

  • IEEE Communication Society / Signal Processing Society (Senior Member)

    2008.4

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  • IEICE (Senior Member)

    2007.5

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Committee Memberships

  • IEEE Access   Associate Editor  

    2021.9   

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    Committee type:Academic society

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  • IEEE Consumer Technology Society News on Consumer Technology   Editorial Board  

    2021.6   

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Papers

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MISC

  • An Investigation of the Tradeoff between the Power Efficiency and Constellation Performance for RIS based Spatial Modulation System

    前崎一星, 虫明春哉, HOU Yafei, 田野哲

    電子情報通信学会大会講演論文集(CD-ROM)   2023   2023

  • A configuration for overloaded MU-MIMO systems

    宮田一輝, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   123 ( 108(RCS2023 79-100) )   2023

  • Mitigation of the Performance Loss of Spatial Modulation using LCX from Position Mismatch

    嶽草一郎, 永山拳大, HOU Yafei, 田野哲

    電子情報通信学会大会講演論文集(CD-ROM)   2023   2023

  • 過負荷MIMO無線通信システムのための線形受信機の研究

    田野哲, 侯亜飛

    電気通信普及財団研究調査助成報告書(Web)   ( 37 )   2022

  • 位置情報を用いた漏洩同軸ケーブルスロットの開閉による空間変調の容量拡大の研究

    侯亜飛, 田野哲

    電気通信普及財団研究調査助成報告書(Web)   ( 37 )   2022

  • A Study on Iterative Soft Decision Maximum Likelihood Decoding Method for MIMO-OFDM

    真壁修平, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   121 ( 391(RCS2021 251-299) )   2022

  • Iterative Soft Decision Maximum Likelihood Decoding Method for MIMO-OFDM

    真壁修平, 田野哲, HOU Yafei

    電子情報通信学会大会講演論文集(CD-ROM)   2022   2022

  • Performance of Frequency Domain Non-orthogonal Multiple Access With Adaptive Resource Allocation

    田野哲, 山上太智, HOU Yafei

    電子情報通信学会技術研究報告(Web)   122 ( 235(RCS2022 128-154) )   2022

  • Nonlinear Overloaded MIMO Communication System with Equal Gain Filter

    杉本匠, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   122 ( 252(RCS2022 155-184) )   2022

  • Characteristics of Non-Orthogonal Multiple Access that allocates subcarriers based on factor graphs

    山上大智, 田野哲, 侯亜飛

    電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

  • Multi-input Physical Layer Network Coding In wireless two-way relay networks

    次田英明, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   120 ( 406(SRW2020 51-83) )   2021

  • Non-Orthogonal Multiple Access that allocates subcarriers based on factor graphs

    山上大智, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   120 ( 406(SRW2020 51-83) )   2021

  • Maximum Likelihood Doppler Frequency Detection Using Channel Impulse Response Estimation

    堀田和真, 田野哲, HOU Yafei

    電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

  • Positioning Scheme by vertical placement for LCX-MIMO system

    永山拳大, ZHU Junjie, HOU Yafei, 田野哲

    電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

  • Opportunistic Scheduling for Downlink MU-MIMO Systems

    LU Youchen, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   121 ( 145(SRW2021 13-28) )   2021

  • Optimal terminal selection based on Doppler frequency estimation for terminal cooperative communications

    藤井拓真, 田野哲, HOU Yafei, 村田英一

    電子情報通信学会技術研究報告(Web)   121 ( 173(CQ2021 37-62) )   2021

  • Precoding method for Overloaded Physical-Layer Network Coding

    谷川智也, 田野哲, HOU Yafei

    電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

  • A proposal of Spatial Modulation using Slots of Leaky Coaxial Cable

    永山拳大, ZHU Junjie, HOU Pengcheng, HOU Yafei, 田野哲

    電子情報通信学会大会講演論文集(CD-ROM)   2021   289 - 290   2021

  • Soft Input Decoding Based on Superposition of Hard Decision Signals

    柏原光希, 田野哲, HOU Yafei

    電子情報通信学会技術研究報告(Web)   121 ( 265(SRW2021 29-52) )   2021

  • A Study on Generalized Time-Frequency Spatial Modulation System using Variable Partial OFDM Symbol Transmission

    青山智哉, HOU Yafei, 田野哲

    電子情報通信学会技術研究報告(Web)   121 ( 234(RCS2021 143-174) )   2021

  • Iterative Hard Dicision Decoding in a Linear Multilevel QAM Receiver for Overloaded MIMO

    119 ( 377 )   1 - 6   2020.1

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  • Research and Development on Outage Probability Prediction of Required QoS for Factory Environment

    矢野一人, 菅宣理, 菅宣理, WEBBER Julian, WEBBER Julian, HOU Yafei, HOU Yafei, 新居英志, 東森敏英, 鈴木義規

    電子情報通信学会技術研究報告(Web)   120 ( 204(RCS2020 92-109) )   2020

  • Soft Decision Decoding using MMSE-Based Lattice Reduction for MIMO

    柏原光希, 田野哲, HOU Yafei

    電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

  • Shared Dataset Framework toward Applications of Machine Learning and Mathematical Optimization for 6G

    丸田一輝, 井田悠太, HOU Yafei, 牟田修, 岡田啓, 西村寿彦, 岡本英二, 眞田幸俊, 村田英一, 田野哲

    電子情報通信学会技術研究報告(Web)   120 ( 204(RCS2020 92-109) )   2020

  • A Study on Categorization of Busy/Idle History for Autoregressive Based Busy/Idle Duration Prediction over Real Environmental Channel

    118 ( 434 )   121 - 126   2019.1

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  • Prediction Scheme of WLAN Idle Status using Probabilistic Neural Network and Implementation on FPGA

    ウェバー ジュリアン, メーボドニヤ アボルファズル, 侯 亜飛, 矢野 一人, 臼井 誠, 熊谷 智明

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117 ( 457 )   117 - 124   2018.2

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  • Side band selection for cancellation of periodic interference

    木村 祐哉, 田野 哲, 侯 亜飛

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117 ( 394 )   61 - 65   2018.1

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  • Side band selection for cancellation of periodic interference

    木村 祐哉, 田野 哲, 侯 亜飛

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117 ( 396 )   61 - 65   2018.1

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  • Side band selection for cancellation of periodic interference

    木村 祐哉, 田野 哲, 侯 亜飛

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117 ( 395 )   61 - 65   2018.1

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  • Space-Time Block Coding in a Single Frequency Network with partial Layered Division Multiplexing for DTV Terrestrial System (放送技術)

    PADERNA Ryan, HOU Yafei, OKADA Minoru

    映像情報メディア学会技術報告 = ITE technical report   41 ( 11 )   37 - 40   2017.3

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  • Throughput Measurement of 2-by-2 LCX-MIMO System over Linear Corridor Environment (放送技術)

    ZHU Zeyu, ZHANG Hao, HOU Yafei, TSUKAMOTO Satoshi, HIGASHINO Takeshi, OKADA Minoru, KUMAGAI Tomoaki

    映像情報メディア学会技術報告 = ITE technical report   41 ( 6 )   37 - 40   2017.2

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  • Localization of Radio Terminals in Leaky Coaxial Cable MIMO System

    岡田 実, 東野 武史, 侯 亜飛

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   116 ( 397 )   7 - 11   2017.1

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  • Throughput Measurement Configuration of 2-by-2 LCX-MIMO System over Real Indoor Linear-cell Environment (信号処理)

    ZHANG Hao, ZHU Zeyu, HOU Yafei, TSUKAMOTO Satoshi, HIGASHINO Takeshi, OKADA Minoru, KUMAGAI Tomoaki

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   116 ( 395 )   223 - 226   2017.1

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  • Channel Occupancy Ratio Prediction in Real Environment Using Auto-regressive Integrated Predictor

    HOU Yafei, HOU Yafei, WEBBER Julian, MEHBODNIYA Abolfazl, YANO Kazuto, KUMAGAI Tomoaki

    電子情報通信学会大会講演論文集(CD-ROM)   2017   2017

  • Prediction of Idle Slot Availability using Probabilistic Neural Network for WLAN

    WEBBER Julian, MEHBODNIYA Abolfazl, HOU Yafei, HOU Yafei, YANO Kazuto, KUMAGAI Tomoaki

    電子情報通信学会大会講演論文集(CD-ROM)   2017   2017

  • Channel Busy/Idle Duration Prediction Using Auto-regressive Predictor for Video and Audio Service over WLAN System

    HOU Yafei, HOU Yafei, WEBBER Julian, YANO Kazuto, KUMAGAI Tomoaki

    電子情報通信学会大会講演論文集(CD-ROM)   2017   2017

  • WLAN Link Variability and Its Implications for Packet Prediction and Link Adaptation

    GONZALEZ Miguel Angel Patino, GONZALEZ Miguel Angel Patino, WEBBER Julian, HOU Yafei, HOU Yafei, YANO Kazuto, KUMAGAI Tomoaki

    電子情報通信学会大会講演論文集(CD-ROM)   2017   2017

  • Low Complexity Compressed Sensing Based Channel Estimation with Measurement Matrix Optimization for OFDM System (無線通信システム)

    FERDIAN Rian, PUSPITA Ratih H., HOU Yafei, OKADA Minoru

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   116 ( 318 )   17 - 21   2016.11

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  • Time Domain Compressed Sensing based Channel Estimation in Fast Fading Channel with Fractional Delay (放送技術)

    PADERNA Ryan, THANG Duong Quang, HOU Yafei, HIGASHINO Takeshi, OKADA Minoru

    映像情報メディア学会技術報告 = ITE technical report   40 ( 35 )   5 - 8   2016.10

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  • Bluetooth Low Energyマルチホップ通信を用いた斜面崩壊予兆検知システムの実装と評価

    藤本 まなと, 松本 誠義, 諏訪 博彦, 荒川 豊, 侯 亜飛, 塚本 悟司, ウエバー ジュリアン, 矢野 一人, 畑山 満則

    マルチメディア,分散協調とモバイルシンポジウム2016論文集   ( 2016 )   638 - 644   2016.7

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  • Autonomous Establishment of Multi-Hop Sensor Network Using Wireless LAN and Bluetooth and Priority Control Considering Property of Information

    矢野 一人, 塚本 悟司, ウェバー ジュリアン, 熊谷 智明, 侯 亜飛, 藤本 まなと, 諏訪 博彦, 荒川 豊, 畑山 満則

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115 ( 472 )   49 - 54   2016.3

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  • B-17-8 Multi-hop Network System with WLAN and Bluetooth

    Tsukamoto Satoshi, Webber Julian, Yano Kazuto, Kumagai Tomoaki, Hou Yafei, Fujimoto Manato, Suwa Hirohiko, Arakawa Yutaka

    Proceedings of the IEICE General Conference   2016 ( 1 )   611 - 611   2016.3

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  • Construction of Sensor Network for Detecting Slope Failures using Secondhand Smartphones

    諏訪 博彦, 松本 誠義, 藤本 まなと, 荒川 豊, 侯 亜飛, 塚本 悟司, ウエバー ジュリアン, 矢野 一人, 畑山 満則

    社会情報システム学シンポジウム学術講演論文集   22   209 - 212   2016.1

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  • LCX(漏えい同軸ケーブル)を用いた無線LANシステム

    塚本 悟司, 侯 亜飛, 鈴木 文生, 丹羽 敦彦

    電子情報通信学会 通信ソサイエティマガジン   10 ( 2 )   86 - 91   2016

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    DOI: 10.1587/bplus.10.86

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  • アンライセンスバンドの周波数資源の利活用 LCX(漏えい同軸ケーブル)を用いた無線LANシステム

    塚本悟司, HOU Yafei, 鈴木文生, 丹羽敦彦

    通信ソサイエティマガジン   ( 38 )   2016

  • Bluetooth Low Energyマルチホップ通信を用いた斜面崩壊予兆検知システムの実装と評価

    藤本まなと, 松本誠義, 諏訪博彦, 荒川豊, HOU Yafei, 塚本悟司, WEBBER Julian, 矢野一人, 畑山満則

    情報処理学会シンポジウムシリーズ(CD-ROM)   2016 ( 1 )   2016

  • 大容量無線通信の実現に向けた非線形MU-MIMOの伝送性能評価

    矢野一人, 塚本悟司, 薗部聡司, 薗部聡司, HOU Yafei, HOU Yafei, 前田隆宏, 伴弘司, 伴弘司, 宇野雅博, 宇野雅博, 小林聖, 小林聖

    電子情報通信学会論文誌 B(Web)   J99-B ( 8 )   2016

  • Capacity Comparison of 4-by-4 MIMO Channel Using Leaky Coaxial Cables for Linear-cells with Different Power Allocation Methods (高信頼制御通信)

    LI Sha, HOU Yafei, HIGASHINO Takeshi

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115 ( 366 )   251 - 256   2015.12

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  • A-5-11 MUSIC-algorithm-based Positioning Scheme for LCX-MIMO system

    Oki Shuhei, Hou Yafei, Higashino Takeshi, Okada Minoru

    Proceedings of the IEICE General Conference   2015   121 - 121   2015.2

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  • B-17-10 Service Detection for Audio and Video Using Periodical Characteristics of Transmission Pattern

    Hou Yafei, Miyasaka Tomohiro, Yano Kazuto, Ariyoshi Masayuki, Kumagai Tomoaki

    Proceedings of the IEICE General Conference   2015 ( 1 )   557 - 557   2015.2

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  • Two-dimensional Positioning for Radio Terminal in 4 by 4 MIMO System Using Leaky Coaxial Cable Antenna

    OKI Shuhei, Hou YAFEI, HIGASHINO Takeshi, OKADA Minoru

    ITE Technical Report   39 ( 0 )   45 - 48   2015

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    This article proposes a positioning method for radio terminals by using Leaky Coaxial Cable(LCX) antenna. A Longitudinal position detection method in 2 by 2 LCX-MIMO system using signal TDoA has already proposed. This article expands this system in 4 by 4 LCX-MIMO system and explains how to detect a radial position in 4 by 4 system. In addition, MUSIC algorithm is introduced in the proposal method to estimate position accurately. As a result of performance evaluation by the computer, it is found that the proposed method has high accuracy compared with the conventional method.

    DOI: 10.11485/itetr.39.4.0_45

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  • MUSIC Algorithm based Accurate Radio Terminal Positioning in LCX-MIMO System

    OKI Shuhei, YAFEI Hou, HIGASHINO Takeshi, OKADA Minoru

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   114 ( 370 )   119 - 123   2014.12

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    This article proposes an accuracy improving method by using signal Time Difference Of Arrival (TDOA) in LCX positioning system for radio terminals. The MUSIC algorithm is introduced in the proposal method to estimate position accurately without increasing frequency bandwidth. As a result of computer simulation, it is found that the proposed method has high accuracy compared with the estimation method which using IFFT.

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  • Linear Cell MIMO Using Leaky Coaxial Cable : A Realization of High Reliability and Low Latency System in 5th Generation Mobile Communications Network

    TSUKAMOTO Satoshi, MAEDA Takahiro, HOU Yafei, ARIYOSHI Masayuki, KOBAYASHI Kiyoshi, KUMAGAI Tomoaki

    Technical report of IEICE. RCS   114 ( 254 )   55 - 60   2014.10

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    We studied multi-input multi-output(MIMO) techniques for a linear cell with leaky coaxial cables (LCXs) to reduce hand over frequency in a small cell and to keep spacial multiplicity high in the line-of-sight conditions. In this paper, an advantage of linear cell with an LCX is described, and then a structure of the LCX and a principle of electromagnetic radiation from the LCX are explained. After we introduce the proposed methods that are 2 by 2 MIMO with a single LCX and with closely separation LCXs, feasibility of the proposed methods are shown by results of a condition number calucuration and experiments using equipments of wireless local area networks on the market.

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  • B-1-147 Block Error Rate Measurements of 2×2 MIMO System with Single Leaky Coaxial Cable

    Tsukamoto Satoshi, Maeda Takahiro, Hou Yafei, Ariyoshi Masayuki, Kobayashi Kiyoshi

    Proceedings of the Society Conference of IEICE   2014 ( 1 )   147 - 147   2014.9

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  • A Proposal for Radio on Optical OOK System

    KANEKO Yuya, HIGASHINO Takeshi, HOU Yafei, OKADA Minoru

    IEICE technical report   114 ( 163 )   129 - 130   2014.7

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    Data offloading by distributed many femto-cell base stations is one of solutions to provide large wireless communication capacity. Radio over Fiber (RoF) technique can integrate the base stations and reduce the cost of maintenance. In this paper, a simultaneous transmission scheme for both optical On-Off Keying (OOK) signal and radio frequency (RF) signal is proposed. The quality of the RF signal transmitted with 10G Ethernet is experimentally evaluated. An interference suppression scheme and an optimum threshold for detecting OOK signal are proposed.

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  • A Proposal for Radio on Optical OOK System

    KANEKO Yuya, HIGASHINO Takeshi, HOU Yafei, OKADA Minoru

    Technical report of IEICE. RCS   114 ( 164 )   183 - 184   2014.7

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    Data offloading by distributed many femto-cell base stations is one of solutions to provide large wireless communication capacity. Radio over Fiber (RoF) technique can integrate the base stations and reduce the cost of maintenance. In this paper, a simultaneous transmission scheme for both optical On-Off Keying (OOK) signal and radio frequency (RF) signal is proposed. The quality of the RF signal transmitted with 10G Ethernet is experimentally evaluated. An interference suppression scheme and an optimum threshold for detecting OOK signal are proposed.

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  • A Proposal for Radio on Optical OOK System

    KANEKO Yuya, HIGASHINO Takeshi, HOU Yafei, OKADA Minoru

    IEICE technical report. RCC, Reliable communication and control   114 ( 162 )   151 - 152   2014.7

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    Data offloading by distributed many femto-cell base stations is one of solutions to provide large wireless communication capacity. Radio over Fiber (RoF) technique can integrate the base stations and reduce the cost of maintenance. In this paper, a simultaneous transmission scheme for both optical On-Off Keying (OOK) signal and radio frequency (RF) signal is proposed. The quality of the RF signal transmitted with 10G Ethernet is experimentally evaluated. An interference suppression scheme and an optimum threshold for detecting OOK signal are proposed.

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  • A Proposal for Radio on Optical OOK System

    KANEKO Yuya, HIGASHINO Takeshi, HOU Yafei, OKADA Minoru

    IEICE technical report. ASN, Ambient intelligence and sensor networks   114 ( 166 )   159 - 160   2014.7

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    Data offloading by distributed many femto-cell base stations is one of solutions to provide large wireless communication capacity. Radio over Fiber (RoF) technique can integrate the base stations and reduce the cost of maintenance. In this paper, a simultaneous transmission scheme for both optical On-Off Keying (OOK) signal and radio frequency (RF) signal is proposed. The quality of the RF signal transmitted with 10G Ethernet is experimentally evaluated. An interference suppression scheme and an optimum threshold for detecting OOK signal are proposed.

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  • A Proposal for Radio on Optical OOK System

    KANEKO Yuya, HIGASHINO Takeshi, HOU Yafei, OKADA Minoru

    IEICE technical report. SR, Smart radio   114 ( 165 )   171 - 172   2014.7

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    Data offloading by distributed many femto-cell base stations is one of solutions to provide large wireless communication capacity. Radio over Fiber (RoF) technique can integrate the base stations and reduce the cost of maintenance. In this paper, a simultaneous transmission scheme for both optical On-Off Keying (OOK) signal and radio frequency (RF) signal is proposed. The quality of the RF signal transmitted with 10G Ethernet is experimentally evaluated. An interference suppression scheme and an optimum threshold for detecting OOK signal are proposed.

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  • Development of Nonlinear Multi-user MIMO Transmission System Based on Vector Perturbation and Its Field Experimental Results

    YANO Kazuto, TSUKAMOTO Satoshi, SONOBE Satoshi, HOU Yafei, BAN Hiroshi, UNO Masahiro, KOBAYASHI Kiyoshi

    The Journal of the Institute of Electronics, Information, and Communication Engineers   97 ( 4 )   307 - 312   2014.4

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    筆者らは,見通し伝搬路のような伝搬路相関の高い環境における伝送特性を改善するため,ベクトル摂動(Vector Perturbation)に基づく8×8アンテナ構成の非線形マルチユーザMIMO-OFDM伝送システムを開発した.本稿ではその概要を述べ,屋外見通し伝搬路における伝送実験を通じ,空間フィルタリングに基づく線形マルチユーザMIMO伝送と比較して本伝送方式が約1.9倍の周波数利用効率を達成可能であることを示す.更に,本伝送実験を通じて明らかになった非線形マルチユーザMIMOの実用化に向けた課題についても述べる.

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  • B-5-108 Sequentially Switched Antenna Array Receiver : Enhancing Data Transmission Rate on High Speed Vehicles

    Tsukamoto Satoshi, Hou Yafei, Ariyoshi Masayuki, Baba Ryosuke, Yamamoto Shinichiro, Aikawa Satoru

    Proceedings of the IEICE General Conference   2014 ( 1 )   503 - 503   2014.3

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  • B-5-109 Basic Study of Propagation Performance for Sequentially Switched Antenna Array Receiver

    Baba Ryosuke, Yamamoto Shinichiro, Aikawa Satoru, Tsukamoto Satoshi, Hou Yafei, Ariyoshi Masayuki

    Proceedings of the IEICE General Conference   2014 ( 1 )   504 - 504   2014.3

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  • B-1-206 Bandwidth Efficiency of MMSE based MIMO System Using Single LCX Cable

    Hou Yafei, Tsukamoto Satoshi, Ariyoshi Masayuki, Kobayashi Kiyoshi

    Proceedings of the IEICE General Conference   2014 ( 1 )   206 - 206   2014.3

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  • Basic Performance Evaluation on Sequentially Switched Antenna Array Receiver : Enhancing Data Transmission Rate on High Speed Vehicles

    Baba Ryosuke, Yamamoto Shinichiro, Aikawa Satoru, Tsukamoto Satoshi, Hou Yafei, Ariyoshi Masayuki

    IEICE technical report   113 ( 457 )   47 - 51   2014.3

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    In recent years, mobile communication terminals such as smartphone are necessities of life, a number of terminals are present at high density in such train. Public wireless LAN service also increased with increasing the mobile communication terminal. It is expected that traffic becomes 10 times in 2020, insufficient capacity of the entrance circuit is concerned. Public wireless LAN service is provided in high-speed mobile such as the Shinkansen. It is the performance degradation cannot be controlled to fast channel fluctuation in the ordinary equalization, new measures are needed. We proposed that switching the receiving antenna in reverse order direction of travel of the train. It is the technology to fix the reception point at a fixed position, to slow down the channel change. The antenna switching technology has problems (1)setting of appropriate antenna element spacing, (2)timing and switching cycle of the antenna, (3)reduction of the influence of the circuit and switch,(4) responding to MIMO. In this draft, it is simulated the characteristics of the received signal for antenna switching technology as a basic study. Result of simulation, it obtained the reception characteristics as much as quiescent even when moving at high speed by the antenna switching technology has been found. However, as an error of antenna switching, the problem of discontinuity occurs in reception characteristics was found.

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  • Requested Talk : An Experimental Study of the Proposed 2x2 MIMO System with Single Leaky Coaxial Cable

    TSUKAMOTO Satoshi, MAEDA Takahiro, HOU Yafei, ANO Susumu, BAN Hirosi, ARIYOSHI Masayuki, KOBAYASHI Kiyoshi, NIWA Atsuhiko, SUZUKI Fumio, HIGASHINO Takeshi, OKADA Minoru

    IEICE technical report. Antennas and propagation   113 ( 428 )   51 - 56   2014.2

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    Since the traffic by mobile phones and wireless LAN terminals is increasing day by day, we are faced with deficiency of radio resource in a densely populated place, such as a conference centre and a train terminal in a big city. Although to introduce small cell and MIMO technique is effective for the problem, the frequency of handover will increase and MIMO capacity will deteriorate due to an increase of line-of -sight situation. Since linear-cell can reduce the frequency of handover, we are focused on leaky coaxial cable (LCX) which can work on the microwave band. This paper introduce a novel 2×2 multiple-input multiple-output (MIMO) system using only a single LCX, which can double the capacity. We evaluate MIMO capacity as an index of condition number. They are shown that cumulative frequency of MIMO-achievable positions and data throughput at few positions as an initial result of the evaluation. Results of study on location detection for triggering a handover are also discussed.

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  • Performance Evaluation of Nonlinear Multiuser MIMO Based on Vector Perturbation over Low Mobility Channel

    Yano Kazuto, Sonobe Satoshi, Hou Yafei, Tsukamoto Satoshi, Uno Masahiro, Kobayashi Kiyoshi

    Proceedings of the Society Conference of IEICE   2013 ( 1 )   "SS - 9"-"SS-10"   2013.9

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  • B-17-2 On the Impact of Duration of Spectrum Sensing for WLAN Systems Considering Imperceptible Signals(B-17.ソフトウェア無線,一般セッション)

    Hou Yafei, Miyasaka Tomohiro, Yano Kazuto, Ariyoshi Masayuki, Kobayashi Kiyoshi

    電子情報通信学会ソサイエティ大会講演論文集   2013 ( 1 )   487 - 487   2013.9

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  • B-5-6 Outdoor Experiments of Symmetrical Symbol Mapping in an Extended Symbol Mapping Area for Vector Perturbation MU-MIMO

    Sonobe Satoshi, Tsukamoto Satoshi, Maeda Takahiro, Hou Yafei, Yano Kazuto, Uno Masahiro, Kobayashi Kiyoshi

    Proceedings of the IEICE General Conference   2013 ( 1 )   416 - 416   2013.3

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  • B-5-7 Symbol Error Ratio Analysis for Zero-forcing Vector Perturbation Algorithm with Mismatch of Modulo Size

    Hou Yafei, Sonobe Satoshi, Tsukamoto Satoshi, Yano Kazuto, Uno Masahiro, Kobayashi Kiyoshi

    Proceedings of the IEICE General Conference   2013 ( 1 )   417 - 417   2013.3

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  • A Study on Modulo Boundary Setting of Vector Perturbation Considering Inter-Stream Interference

    Yano Kazuto, Sonobe Satoshi, Hou Yafei, Tsukamoto Satoshi, Uno Masahiro, Kobayashi Kiyoshi

    Technical report of IEICE. RCS   112 ( 351 )   251 - 256   2012.12

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    To reduce the modulo boundary setting error of vector perturbation using MMSE spatial filtering, this paper proposes a new setting method which considers both the desired signal component and the inter-stream interference component in the received signal after precoding. The effectiveness of the proposed method is confirmed through computer simulation of a downlink multiuser MIMO-OFDM transmission which assumes WINNER II A1 LOS channel.

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  • R&D of a Nonlinear Multiuser MIMO System Targeting Small-Cell Environments : -Its Advantage and Challenges for Practical Systems-

    YANO Kazuto, SONOBE Satoshi, HOU Yafei, TSUKAMOTO Satoshi, BAN Hiroshi, UNO Masahiro, KOBAYASHI Kiyoshi

    Technical report of IEICE. RCS   112 ( 286 )   43 - 48   2012.11

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    The authors have evaluated the performance of MIMO-OFDM transmission based on vector perturbation (VP)precoding in small-cell environment, and studied several techniques to overcome some issues for developing practical systems. This paper shows some results of performance evaluation of the VP-based nonlinear multiuser MIMO-OFDM transmission obtained from computer simulations and indoor experiments using radio equipment developed by the authors. In addition, some issues developing practical systems are explained.

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  • R&D of a Nonlinear Multiuser MIMO System Targeting Small-Cell Environments : Its Advantage Challenges for Practical Systems

    YANO Kazuto, SONOBE Satoshi, HOU Yafei, TSUKAMOTO Satoshi, BEN Hiroshi, UNO Masahiro, KOBAYASHI Kiyoshi

    IEICE technical report. Antennas and propagation   112 ( 285 )   49 - 54   2012.11

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    The authors have evaluated the performance of MIMO-OFDM transmission based on vector perturbation (VP) precoding in small-cell environment, and studied several techniques to overcome some issues for developing practical systems. This paper shows some results of performance evaluation of the VP-based nonlinear multiuser MIMO-OFDM transmission obtained from computer simulations and indoor experiments using radio equipment developed by the authors. In addition, some issues developing practical systems are explained.

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  • A Proposal of a Symmetric Extended Symbol Mapping for Vector Perturbation

    SONOBE Satoshi, TSUKAMOTO Satoshi, MAEDA Takahiro, HOU Yafei, YANO Kazuto, UNO Masahiro, KOBAYASHI Kiyoshi

    Technical report of IEICE. RCS   112 ( 286 )   85 - 90   2012.11

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    This paper proposes a symmetric extended symbol mapping, which assigns signal points symmetrically about the modulo boundaries on the IQ plane of vector perturbation (VP). Although VP improves the throughput of multiuser multiple-input multiple-output (MU-MIMO)transmission over highly correlated channels, the error of modulo boundary setting of a demodulator leads significant performance degradation. The proposed method alleviates the impact of the boundary setting errors by assigning same signal points around the modulo boundaries. Simulation results confirm that the proposed method effectively improves the BER performance.

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  • Impact of spatial filtering weight on performance of multiuser MIMO transmission with vector perturbation

    YANO Kazuto, SONOBE Satoshi, HOU Yafei, TSUKAMOTO Satoshi, UNO Masahiro, KOBAYASHI Kiyoshi

    Technical report of IEICE. RCS   112 ( 239 )   189 - 194   2012.10

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    This paper evaluates the performance of 8×8 downlink multiuser MIMO-OFDM transmission based on vector perturbation (VP) precoding which employs zero-forcing (ZF) or MMSE spatial filtering. Through computer simulations assuming a frame format similar to 3GPP Release 10 downlink and WINNER II A1 LOS channel, it is shown that MMSE-based VP can reduce the norm of the transmission signal vector compared with ZF-based VP, and thus it can achieve higher average sum-rate if the modulo boundary size for demodulation is set properly. It is also confirmed that the modulo boundary size must be set by taking account for the amount of inter-stream interference.

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  • Precoding Weight Interpolation Method to Mitigate Spectrum Efficiency Loss of Vector Perturbation Based Multiuser MIMO with Limited CSI Feedback

    HOU Yafei, SONOBE Satoshi, TSUKAMOTO Satoshi, YANO Kazuto, UNO Masahiro, KOBAYASHI Kiyoshi

    IEICE Technical Report   112 ( 239 )   195 - 200   2012.10

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    Vector perturbation (VP) algorithm requires perfect channel state information (CSI) for optimal perturbation vector search and generating a spatial filter to pre-equalize the MIMO channel function. Due to the limited CSI feedback and realistic computational complexity (CC) due to hardware implementation, MU-MIMO OFDM system will yield the inefficient perturbated vector and mismatched spatial filter which causes large spectrum efficiency (SE) loss. In this paper, by simulation, it shows that most of performance loss of VP algorithm is derived from the mismatched spatial filter. Therefore, we propose a low-complexity linear interpolation for spatial filter to reduce the SE loss. The proposed interpolation scheme firstly rebuilds the CSI of partial subcarriers from limited feedback CSI by time and frequency domain transformation (TFT). After that, the spatial filter matrices of these partial subcarriers are calculated. Finally the spatial filter matrices of all subcarriers are interpolated by a linear interpolation. The complexity analysis and simulated results show that the proposed interpolation scheme can reduce the SE loss of VP based MU-MIMO OFDM system with low computational complexity.

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  • B-5-86 A Proposal on Antenna Selection for Partial Subcarriers Technique for Block Diagonalized Vector Perturbation Algorithm

    Hou Yafei, Sonobe Satoshi, Yano Kazuto, Uno Masahiro, Kobayashi Kiyoshi

    Proceedings of the IEICE General Conference   2012 ( 1 )   485 - 485   2012.3

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  • B-5-57 Effect of MMSE Reception on Downlink Multiuser MIMO OFDM Transmission over Time-Variant Channel

    Yano Kazuto, Sonobe Satoshi, Hou Yafei, Uno Masahiro, Kobayashi Kiyoshi

    Proceedings of the Society Conference of IEICE   421 - 421   2012

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  • Spectral efficiency evaluation of vector perturbation and MMSE MU-MIMO algorithms with least square channel prediction

    HOU Y., Tsukamoto Satoshi, Sonobe Satoshi, Yano Kazuto, Uno Masahiro, Kobayashi Kiyoshi

    Proc. of IEICE Commun. Conf 2012 Sept   420 - 420   2012

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  • B-5-35 Manipulation of Channel Matrix and Precoding Weight to Avoid Collapse of Multiuser MIMO Transmission Due to Partial Link Failure

    Hou Yafei, Sonobe Satoshi, Yano Kazuto, Uno Masahiro, Ueda Masazumi

    Proceedings of the Society Conference of IEICE   2011 ( 1 )   414 - 414   2011.8

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  • Impact of the Channel Feedback Load Reduction on Performance of Downlink Linear and Nonlinear Multiuser MIMO

    SONOBE Satoshi, HOU Yafei, YANO Kazuto, UNO Masahiro, UEBA Masazumi

    IEICE technical report   111 ( 12 )   65 - 70   2011.4

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    In this paper, on downlink multiuser MIMO-OFDM system, we evalute the impact of reducing the number of subaband on the performance of linear and non-linear algorithms for the purpose of channel feedback load reduction. We also evalute the impact of an analog feedback method, which sends back a channel value estimated at reciever side and can reduce the channel feedback load further. The simulation result shows that reducing the number of subband to 50, the spectral efficiency of linear and non-linear algorithms degrades. Especially the saturated spectral efficiency of linear algorithm degrades largely. In addition, it is shown that using analog feedback, the performance of VP and BD-VP improves largely with reducing the channel feedback load to about 1/3 to 1/4 against the digital feedback. Especially the performance of BD-VP improves in case of high SNR and high Rician factor.

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  • Performance Comparison Among Vector Perturbation, Block Diagonalized Vector Perturbation and Tomlinson-Harashima precoding over MU-MIMO Spatially Correlated Channel

    HOU Yafei, SONOBE Satoshi, YANO Kazuto, UNO Masahiro, UEBA Masazumi

    IEICE technical report   111 ( 12 )   59 - 64   2011.4

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    In this paper, we evaluate the spectral efficiency of the block diagonalized vector perturbation (BD-VP), vector perturbation (VP) and Tomlinson-Harashima precoding (THP) algorithms over correlated MIMO channels with channel state information (CSI) error. The simulated results show that the VP algorithm has high spectral efficiency than the BD-VP algorithm, but it needs a large computational complexity (CC). Although the BD-VP algorithm is more sensitive to high channel correlation than the THP algorithm for a small signal to noise power ratio (SNR) area, we show that it can utilize the interpolation method with noise component cancellation (NCC) to outperform the THP algorithm and achieve to the system capacity of the VP algorithm over correlation channels. Based on the simulated results, the BD-VP algorithm appears a possible way to realize the large spectral efficiency with a relatively small computational complexity over correlated MIMO channels for the picocell or femtocell systems with CSI error.

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  • データ補間処理方法、データ補間処理装置、プログラム、学習処理装置、および、予測処理装置

    菅 宣理, 矢野 一人, ウェバー ジュリアン, 侯 亜飛, 新居 英志, 東森 敏英, 鈴木 義規

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    Application no:特願2020-190717  Date applied:2020.11.17

    Announcement no:特開2022-079868  Date announced:2022.5.27

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  • 通信状況予測装置、通信状況予測方法、および、プログラム

    菅 宣理, 矢野 一人, ウェバー ジュリアン, 侯 亜飛, 東森 敏英, 鈴木 義規

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    Application no:特願2020-022540  Date applied:2020.2.13

    Announcement no:特開2021-129206  Date announced:2021.9.2

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  • 通信状況推定装置、通信状況推定方法、および、プログラム

    菅 宣理, 矢野 一人, ウェバー ジュリアン, 侯 亜飛, 東森 敏英, 鈴木 義規

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    Application no:特願2020-018514  Date applied:2020.2.6

    Announcement no:特開2021-124999  Date announced:2021.8.30

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  • チャネル状態予測装置、無線通信装置、チャネル状態予測方法、および、プログラム

    ウェーバー ジュリアン, メーボド ニヤ アボルファズル, 侯 亜飛, 矢野 一人, 熊谷 智明

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    Application no:特願2017-232442  Date applied:2017.12.4

    Announcement no:特開2019-101792  Date announced:2019.6.24

    Patent/Registration no:特許第7166584号  Date registered:2022.10.28 

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  • チャネル状態予測装置、チャネル状態予測方法、無線通信装置および無線通信方法

    侯 亜飛, ウェーバー ジュリアン, 矢野 一人, 熊谷 智明

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    Application no:特願2017-074972  Date applied:2017.4.5

    Announcement no:特開2018-182405  Date announced:2018.11.15

    Patent/Registration no:特許第7032721号  Date registered:2022.3.1 

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  • デジタル無線通信装置およびデジタル無線通信システム

    塚本 悟司, 前田 隆宏, 侯 亜飛, 有吉 正行, 小林 聖, 鈴木 文生, 丹羽 敦彦

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    Application no:特願2015-005292  Date applied:2015.1.14

    Announcement no:特開2016-059025  Date announced:2016.4.21

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  • デジタル無線通信装置およびデジタル無線通信システム

    塚本 悟司, 前田 隆宏, 侯 亜飛, 有吉 正行, 小林 聖, 鈴木 文生, 丹羽 敦彦

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    Application no:特願2015-005292  Date applied:2015.1.14

    Patent/Registration no:特許第5903699号  Date registered:2016.3.25  Date issued:2016.3.25

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  • デジタル無線受信装置およびデジタル無線通信システム

    塚本 悟司, 侯 亜飛, 有吉 正行

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    Application no:特願2014-049770  Date applied:2014.3.13

    Announcement no:特開2015-177211  Date announced:2015.10.5

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  • 無線通信システムおよび無線通信装置

    小林 聖, 侯 亜飛, 塚本 悟司, 有吉 正行

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    Application no:特願2014-023958  Date applied:2014.2.12

    Announcement no:特開2015-154122  Date announced:2015.8.24

    Patent/Registration no:特許第6330173号  Date registered:2018.5.11  Date issued:2018.5.11

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  • 無線通信システムおよび無線通信装置

    小林 聖, 侯 亜飛, 塚本 悟司, 有吉 正行

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    Application no:特願2014-023958  Date applied:2014.2.12

    Announcement no:特開2015-154122  Date announced:2015.8.24

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  • 無線通信システムおよび無線通信装置

    小林 聖, 侯 亜飛, 塚本 悟司, 有吉 正行

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    Application no:特願2014-021876  Date applied:2014.2.7

    Announcement no:特開2015-149639  Date announced:2015.8.20

    Patent/Registration no:特許第6330172号  Date registered:2018.5.11  Date issued:2018.5.11

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  • 無線通信システムおよび無線通信装置

    小林 聖, 侯 亜飛, 塚本 悟司, 有吉 正行

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    Application no:特願2014-021876  Date applied:2014.2.7

    Announcement no:特開2015-149639  Date announced:2015.8.20

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  • 管理装置、通信システム、無線端末装置、通信制御方法および通信制御プログラム

    岡田 洋侍, 田中 義三, 村上 憲一, 山本 剛史, 山本 裕嗣, 小林 聖, 矢野 一人, 有吉 正行, 宮坂 朋宏, 侯 亜飛, 関口 真理子

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    Applicant:住友電気工業株式会社, 株式会社国際電気通信基礎技術研究所

    Application no:特願2013-244164  Date applied:2013.11.26

    Announcement no:特開2015-104008  Date announced:2015.6.4

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  • 情報管理装置、ローカルネットワークシステム、情報管理方法および情報管理プログラム

    村上 憲一, 岡田 洋侍, 田中 義三, 山本 剛史, 山本 裕嗣, 小林 聖, 矢野 一人, 有吉 正行, 宮坂 朋宏, 関口 真理子, 侯 亜飛

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    Applicant:住友電気工業株式会社, 株式会社国際電気通信基礎技術研究所

    Application no:特願2013-244165  Date applied:2013.11.26

    Announcement no:特開2015-104009  Date announced:2015.6.4

    Patent/Registration no:特許第6478367号  Date registered:2019.2.15 

    J-GLOBAL

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  • 無線通信システム、無線通信装置および無線通信方法

    侯 亜飛, 薗部 聡司, 塚本 悟司, 矢野 一人, 宇野 雅博, 小林 聖

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2013-012273  Date applied:2013.1.25

    Announcement no:特開2014-160885  Date announced:2014.9.4

    Patent/Registration no:特許第6047744号  Date registered:2017.2.3  Date issued:2016.12.2

    J-GLOBAL

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  • 無線通信システム、無線送信装置および無線通信方法

    侯 亜飛, 薗部 聡司, 塚本 悟司, 矢野 一人, 宇野 雅博, 小林 聖

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2012-221726  Date applied:2012.10.3

    Announcement no:特開2014-075679  Date announced:2014.4.24

    Patent/Registration no:特許第6019298号  Date registered:2016.10.14 

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  • 摂動ベクトル選択装置、通信装置、摂動ベクトル選択方法、及びプログラム

    薗部 聡司, 矢野 一人, 侯 亜飛, 宇野 雅博, 小林 聖

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2012-070049  Date applied:2012.3.26

    Announcement no:特開2013-201706  Date announced:2013.10.3

    Patent/Registration no:特許第5845549号  Date registered:2015.12.4 

    J-GLOBAL

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  • 通信装置、通信方法、及びプログラム

    薗部 聡司, 矢野 一人, 侯 亜飛, 宇野 雅博, 小林 聖

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2012-069134  Date applied:2012.3.26

    Announcement no:特開2013-201633  Date announced:2013.10.3

    Patent/Registration no:特許第5830757号  Date registered:2015.11.6 

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  • 無線通信システム、制御装置、無線通信方法、及びプログラム

    侯 亜飛, 薗部 聡司, 宇野 雅博, 矢野 一人, 鈴木 康夫, 上羽 正純

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2011-036536  Date applied:2011.2.23

    Announcement no:特開2012-175476  Date announced:2012.9.10

    J-GLOBAL

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  • 受信装置、フィードバック方法、及びプログラム

    宇野 雅博, 矢野 一人, 薗部 聡司, 侯 亜飛, 上羽 正純

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    Applicant:株式会社国際電気通信基礎技術研究所

    Application no:特願2011-035526  Date applied:2011.2.22

    Announcement no:特開2012-175407  Date announced:2012.9.10

    Patent/Registration no:特許第5681901号  Date registered:2015.1.23 

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Awards

  • Excellent Paper Award

    2017.5   IEICE Communications Society  

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  • IEEE GCCE Excellent 5 Years TPC Service Award

    2016.10   IEEE GCCE 2016 委員会  

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  • 平成26年度ATR発明考案賞 「漏洩同軸ケーブルを用いた大容量MIMO伝送技術」

    2015.3   株式会社 国際電気通信基礎技術研究所  

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  • 2023年度 電子情報通信学会 通信ソサイエティ 活動功労賞

    2023.9  

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  • Excellent Research Award

    2022.3   Faculty of Engineering   自己回帰モデルによる無線LANのチャネル占有時間予測法の確立

    Yafei Hou, Satoshi Denno

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  • 電子情報通信学会

    2021.6   短距離無線通信研究会の2020年度優秀学生賞

    次田英明,田野哲,侯亜飛

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  • 電子情報通信学会

    2021.6   短距離無線通信研究会の2020年度優秀学生賞

    堀田和真, 田野哲, 侯亜飛

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  • 電子情報通信学会

    2021.6   短距離無線通信研究会の2020年度優秀学生賞

    谷川智也,田野哲,侯亜飛

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  • IEEE ICACT 2021 Outstanding Paper Award

    2021.2   IEEE ICACT 2021 委員会  

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  • 2020年度 電子情報通信学会 通信ソサイエティ 活動功労賞

    2020.9  

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  • Excellent Paper Award

    2020.5   IEICE Communications Society  

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  • IEEE Broadcast Technology Society

    2016.6   2016 BTS Distinguished Volunteer Award

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  • Excellent Paper Award

    2016.5   IEICE Communications Society  

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  • メダル受賞

    2015.1   IEEE関西支部  

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  • IEEE GCCE 2014 Excellent Paper Award 1st Prize

    2014.10   IEEE Consumer Electronics Society  

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  • 平成24年度 ATR優秀研究賞 「非線形マルチユーザMIMO技術の実用化研究と性能の実証」

    2014.3   株式会社 国際電気通信基礎技術研究所  

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  • IEEE ICACT 2013 Outstanding Paper Award

    2013.1   IEEE ICACT 2013 委員会  

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Research Projects

  • 伝搬路を再構成可能な反射板を用いた複数異なる伝搬路形成による無線端末測位技術の研究

    2024.04 - 2027.03

    公益財団法人 電気通信普及財団  研究助成 

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  • Analysis of an overloaded spatial multiplexing for high speed wireless communication links

    Grant number:24K07475  2024.04 - 2027.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    田野 哲, 上原 一浩, 冨里 繁, 侯 亜飛

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    Grant amount:\4550000 ( Direct expense: \3500000 、 Indirect expense:\1050000 )

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  • 漏洩同軸ケーブルによる複数端末の2D/3D高精度位置同時推定及び計算量削減手法に関する研究 (3年目)

    2024.04 - 2025.03

    公益財団法人 GMOインターネット財団  GMO研究助成 

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  • 漏洩同軸ケーブルによる複数端末の2D/3D高精度位置同時推定及び計算量削減手法に関する研究 (2年目)

    2023.04 - 2024.03

    公益財団法人 GMOインターネット財団  GMO研究助成 

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  • Intelligent Reflecting Surfaceによるプロアクティブな無線空間制御と耐干渉型空間多重伝送技術の研究開発

    2022.05 - 2024.04

    国立研究開発法人情報通信研究機構 Beyond 5G 研究開発促進事業 

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  • 漏洩同軸ケーブルによる複数端末の2D/3D高精度位置同時推定及び計算量削減手法に関する研究(初年度)

    2022.04 - 2023.03

    公益財団法人 GMOインターネット財団  GMO研究助成 

    侯 亜飛

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  • 無線マルチホップネットワークにおける過負荷通信の研究

    Grant number:21K04061  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    田野 哲, 侯 亜飛, 上原 一浩, 冨里 繁

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    Authorship:Coinvestigator(s) 

    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    第五世代セルラーや無線LANのIEEE 802.11ax 等の研究開発動向からも分かるように、無線ネットワークの高速化・大容量化が止まることを知らない。また、夥しい数のIoTデバイスとインターネットを繋ぐ無線ネットワークの同時接続数は、本格的なIoT時代であろう次世代には、一桁以上増大させる必要がある。高速化を達成するため、広い連続帯域の割り当てが可能な高周波数帯が次世代の無線通信に割り当てられると想定される。高周波数帯の無線信号は伝送路で大きく減衰する。この問題を緩和する、無線マルチホップネットワークが盛んに検討されている。加えて、IoT社会の実現のため、センサー端末が様々な場所、例えば人が足を踏み入れない場所にも配置される。そのような場所との通信を実現するためにも、無線マルチホップネットワークの適用が検討されている。但し、従来の無線マルチホップネットワークを適用した場合には、ホップ数の増大と共に通信速度が低下する問題がある。この問題を克服するため、送信端末や中継端末に複数アンテナを配置して空間多重を適用することが検討されている。但し、空間多重を適用しても、中継端末や送信端末のアンテナ数が少ないことがボトルネックとなり、通信の速度向上を阻むという問題がある。また、無線ネットワークでは晒され端末・中継端末が容易に生まれ、無線マルチホップネットワーク全体の通信速度を制限するという問題がある。
    本研究は無線マルチホップネットワークにおける上記のボトルネックの解消、あるいは緩和が原理的に可能かどうかという学術的な問いに端を発している。複雑な無線マ ルチホップネットワークにおける「中継機のアンテナ数不足」
    や「さらされ中継局」による通信速度低下問題を研究し、この問題の緩和・解消法を探る。 同時に、緩和・解消法を導入したときの通信速度・通信容量の理論を検討する。

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  • 位置情報を用いた漏洩同軸ケーブルスロットの開閉による空間変調の容量拡大の研究

    2021.04 - 2022.03

    公益財団法人 電気通信普及財団  2020年度研究調査助成  研究調査助成

    侯 亜飛

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  • 2D/3D indoor localization using multiple leaky coaxial cables over irregular wireless coverage environment.

    Grant number:20K04484  2020.04 - 2024.03

    日本学術振興会  科学研究費助成事業 基盤研究(C)  基盤研究(C)

    侯 亜飛, 上原 一浩, 冨里 繁, 田野 哲

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    Authorship:Principal investigator 

    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    (1) In this year, using the LCX channel model, we built an indoor scenario and generated RSSI data. Based on the data correlation analysis and prediction theory, the lower bound and upper bound of predictability of generated LCX RSSI data have been researched. Then the RSSI value ahead has been predicted using a probabilistic neural network (PNN). The similar research on indoor localization has also been realized with more accurate localization level using PNN.
    <BR>
    (2) A new research direction of localization of multiple users over wireless coverage using LCX has been proposed, which evaluated the TOA estimation of multiple users in a simultaneous way. Furthermore, we also investigated the capacity improvement of LCX system using spatial modulation with the main idea of on/off the LCX slots.

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  • 過負荷MIMO無線通信システムのための線形受信器の研究

    2020.04 - 2022.03

    公益財団法人 電気通信普及財団  2019年度研究調査助成  研究調査助成

    田野 哲、 侯 亜飛

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  • 狭空間における周波数稠密利用のための周波数有効利用技術の研究開発

    2017.10 - 2021.03

    総務省  電波資源拡大のための研究開発 

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  • スマートフォンアプリケーションによる斜面崩壊検出センサネットワーク構築技術の研究開発

    2015.07 - 2016.03

    総務省  戦略的情報通信研究開発推進事業(SCOPE) 

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  • 超高速移動時の無線通信速度向上に向けた受信点移動型等化技術の研究開発

    2013.09 - 2014.03

    総務省  戦略的情報通信研究開発推進事業(SCOPE) 

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  • 漏洩同軸ケーブルによる高密度配置リニアセルMIMO システムの研究開発

    2013.04 - 2015.03

    総務省  創造的情報通信技術研究開発推進制度(SCOPE) 

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  • M2M型動的無線通信ネットワーク構築技術の研究開発

    2012.09 - 2015.03

    総務省  電波資源拡大のための研究開発 

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  • 非線形マルチユーザMIMO技術の研究開発

    2010.10 - 2013.03

    総務省  電波資源拡大のための研究開発 

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  • Engineering Career Formation (2024academic year) 1st-4th semester  - [第1学期]月7~8, [第2学期]その他, [第3学期]水5~6, [第4学期]水5~6

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  • Special Lectures I (2021academic year) special  - その他

  • Specific Research of Electronics and Information Systems Engineering (2021academic year) Year-round  - その他

  • Topics in Electronic and Information Systems Engineering (2021academic year) Prophase  - 金1,金2

  • Electrical and Communication Engineering Lab B (2021academic year) 3rd and 4th semester  - 水2,水3,水4,水5,水6

  • Introduction to Innovation (2020academic year) Late  - 月7,月8,金7,金8

  • Introduction to Innovation (2020academic year) Late  - 月7~8,金7~8

  • Laboratory Work and Practice on Basic Engineering (2020academic year) 1st and 2nd semester  - 火4,火5,火6,火7

  • Laboratory Work and Practice on Basic Engineering (2020academic year) 1st and 2nd semester  - 火4,火5,火6,火7

  • Special Lectures (2020academic year) special  - その他

  • Special Lectures II (2020academic year) special  - その他

  • Special Lectures I (2020academic year) special  - その他

  • Specific Research of Electronics and Information Systems Engineering (2020academic year) Year-round  - その他

  • Electrical and Communication Engineering Lab B (2020academic year) 3rd and 4th semester  - 水2,水3,水4,水5,水6

  • Electrical and Communication Engineering Lab II (2020academic year) 3rd and 4th semester  - 水2,水3,水4,水5,水6

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